361729 has 4 divisors (see below), whose sum is σ = 367920. Its totient is φ = 355540.

The previous prime is 361727. The next prime is 361747. The reversal of 361729 is 927163.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 927163 = 17 ⋅54539.

It is a cyclic number.

It is not a de Polignac number, because 361729 - 2¹ = 361727 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 361697 and 361706.

It is not an unprimeable number, because it can be changed into a prime (361723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3007 + ... + 3124.

It is an arithmetic number, because the mean of its divisors is an integer number (91980).

2³⁶¹⁷²⁹ is an apocalyptic number.

It is an amenable number.

361729 is a deficient number, since it is larger than the sum of its proper divisors (6191).

361729 is an equidigital number, since it uses as much as digits as its factorization.

361729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6190.

The product of its digits is 2268, while the sum is 28.

The square root of 361729 is about 601.4391074747. The cubic root of 361729 is about 71.2515707051.

It can be divided in two parts, 361 and 729, that multiplied together give a square (263169 = 513²).

The spelling of 361729 in words is "three hundred sixty-one thousand, seven hundred twenty-nine".